These are leftovers from when I was caring for my elderly cat. The small ones were used for water. The large ones were used for paste food. Paste food with small solids tends to clog, so it's easier to use if you crush it with a mortar and pestle before putting it in. ^_^ Terumo Syringe 2.5ml x 4 Terumo Syringe 10ml x 17 I will not sell these individually.